Doosan D55C-9 - Page 102

Operation Section
-99-
NCD (NOx Control Diagnosis) Inducement (Diesel Stage 5 below 55 kW only)
There are several interruption level points at which the Emission System indicator and engine check lamps light
up or blink and the display shows a message to warn that the NOx is not being reduced due to a fault on the
engine EGR valve. The lower the point, the more the system limits the engine power and speed. As shown in
the table below, for your information, we provide correlation of NCD (NOx Control Diagnosis) Inducement
strategy and LCD display.
Impeded EGR and Tampering
Inducement
Stage
Condition
Repeat
Offence
(within
40hrs)
Inducement Strategy
DEF
Level
Indicator
Emission
System
Indicator
Engine
Check
Lamp
Buzzer
Torque
Reduction
RPM
Limit
Normal
NA
≥ 95% of
counter
value for
severe
inducement
(100hrs)
Green ON Off Off Off 0% NA
Level1
Impeded
EGR
detected
Green ON On Off Off 0% NA
Level2
36~100hrs Green ON On On
At starting &
Every 20min
25% NA
Level3
over
100hrs
Green ON Blinking Blinking Every 10min 50%
60%
(about
1500rpm)
Inducement
Stage
Condition
Repeat
Offence
(within 40hrs)
LCD Display
Method Message on the Display
Normal
NA
≥ 95% of
counter
value for
severe
inducement
(100hrs)
NA NA
Level1
Impeded
EGR
detected
At starting & Every
20min
DPF/Aftertreatment SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power will be Reduced
Level2
36~100hrs Every 10min
DPF/Aftertreatment SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power is Reduced By 25%
Level3
over
100hrs
Continuous
DPF/Aftertreatment SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power is Reduced By 50%